怎样简便就怎样算14+34×33×（215+112）-1424×（38+13+512）917÷7+17×8172627×28（512-37）-（47-712）-数学
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=3×
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=
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=
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=
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=
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（3）24×（
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=24×
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=9+8+10，
=27；
（4）
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=
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